tools: Remove hashes from metadata.

- Hashes aren't strictly metadata.
- Which types of hashes are popular?
- Hashes are expensive to calculate.

eris/tools.py

@@ -187,7 +187,7 @@ def _pretty_bytes(bytes):
     return f"{conversion} {units[unit_index]}"
 
 
-@deps(deps={"file", "coreutils"}, executables={"file", "sha1sum", "md5sum"})
+@deps(deps={"file", "coreutils"}, executables={"file"})
 def metadata(path):
 
     def detail(value, unit):
@@ -213,10 +213,6 @@ def metadata(path):
     stdout, *rest = _do_command(
         ["file", "--dereference", "--brief", "--uncompress", path])
     file_type = stdout
-    stdout, *rest = _do_command(["md5sum", path])
-    md5sum = stdout.split()[0]
-    stdout, *rest = _do_command(["sha1sum", path])
-    sha1sum = stdout.split()[0]
     permissions_value = [permissions,
                          detail(_permissions_in_octal(permissions), None)]
     text = []
@@ -226,7 +222,6 @@ def metadata(path):
             ("access time", access), None,
             ("owner", owner), ("group", group), None,
             ("hardlinks", hardlinks), ("symlink", is_symlink), None,
-            ("md5", md5sum), ("sha1", sha1sum), None,
             ("mime type", mime_type.strip()),
             ("file type", file_type.strip())]:
         if line is None:

tests/golden-files/results/metadata-hi3_py

@@ -11,8 +11,5 @@
 (Bhardlinks:(B      2                                         
 (Bsymlink:(B        no                                        
                                                           
-(Bmd5:(B            28ca2e417cb64ea4e555efe3203642de          
-(Bsha1:(B           8b8c0214f3f0a0d79032d1b44550064964a33a26  
-                                                          
 (Bmime type:(B      text/x-python; charset=us-ascii           
 (Bfile type:(B      Python script, ASCII text executable      (B